html-domparser.js

/*
 * DOMParser HTML extension
 * 2012-09-04
 * 
 * By Eli Grey, http://eligrey.com
 * Public domain.
 * NO WARRANTY EXPRESSED OR IMPLIED. USE AT YOUR OWN RISK.
 */

/*! @source https://gist.github.com/1129031 */
/*global document, DOMParser*/

(function(DOMParser) {
	"use strict";

	var
	  DOMParser_proto = DOMParser.prototype
	, real_parseFromString = DOMParser_proto.parseFromString
	;

	// Firefox/Opera/IE throw errors on unsupported types
	try {
		// WebKit returns null on unsupported types
		if ((new DOMParser).parseFromString("", "text/html")) {
			// text/html parsing is natively supported
			return;
		}
	} catch (ex) {}

	DOMParser_proto.parseFromString = function(markup, type) {
		if (/^\s*text\/html\s*(?:;|$)/i.test(type)) {
			var
			  doc = document.implementation.createHTMLDocument(markup.substr(markup.indexOf('<title>') + 7, markup.indexOf('</title>') - markup.indexOf('<title>') - 7))
			;

			doc.body.innerHTML = markup;
      			if (doc.body.getElementsByTagName('title')[0]) {
        			doc.body.removeChild(doc.body.getElementsByTagName('title')[0]);
      			}
			return doc;
		} else {
			return real_parseFromString.apply(this, arguments);
		}
	};
}(DOMParser));

I remove this

if (markup.toLowerCase().indexOf('<!doctype') > -1) {
        console.log(markup);
        console.log('inserindo o elemento doc \n\n');
        //doc.documentElement.innerHTML = markup;
        doc.body.innerHTML = markup;
      } else {
        doc.body.innerHTML = markup;
      }

and i changed for this

doc.body.innerHTML = markup;

and I got the result I needed.